Fix issue with "damaged" app.

In macOS Sierra 10.12.4, when I try to run World Of Warcraft-64.app or World Of Warcraft.app I just received the below error:
“World Of Warcraft-64.app” is damaged and can’t be opened. You should move it to the Trash.

The solution is to run World Of Warcraft.app/Contents/MacOS/World of Warcraft file from terminal!

To get around this simply open terminal, and type: sudo spctl --master-disable
Now hit enter, and type in your password.
Now when you try to open it you should get a prompt that it is not from an identified developer. You can click through that, and launch it.